Squid 3.5.x < 3.5.18 Multiple Vulnerabilities

medium Nessus Network Monitor Plugin ID 9776
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Synopsis

The remote proxy server is affected by multiple attack vectors.

Description

Versions of Squid 3.5.x prior to 3.5.18 are affected by multiple vulnerabilities :

- A flaw is triggered as input is not properly validated when handling HTTP request messages. This may allow a remote attacker to conduct a cache poisoning attack.
- A flaw is triggered as input is not properly sanitized when handling specially crafted host headers. This may allow a remote attacker to bypass same-origin protection mechanisms and cause the program to contact the wrong origin server. This may also poison downstream caches.
- Flaws in pointer handling and reference counting are triggered when handling specially crafted ESI response syntax. This may allow a remote server to cause a denial of service for Squid clients.

Solution

Either upgrade to Squid version 3.5.18 or later, or apply the vendor-supplied patch.

See Also

http://www.squid-cache.org/Advisories/SQUID-2016_9.txt

Plugin Details

Severity: Medium

ID: 9776

Family: Web Servers

Published: 11/11/2016

Updated: 3/6/2019

Dependencies: 3389

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 5.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

Patch Publication Date: 5/6/2016

Vulnerability Publication Date: 5/6/2016

Reference Information

CVE: CVE-2016-4553, CVE-2016-4554, CVE-2016-4555, CVE-2016-4556